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A gallery of bacterial assemblies on the root surface. (A) Image showing diverse assemblies of green SBW25 cells on the root surface: 1, individual cells; 2, cell doublets; 3, microcolonies; and 4, biofilms. (B) Projection of a reconstructed 3D volume with side views reveals a vertical alignment of cells within the biofilm. Scale bar indicates 10 μm length. Observations were performed in a root zone similar as that shown in Figure 3.
